Manufacturing solder



ED sru rus EMIL PIERRE JEAN PRUDENI suvrmu JAusE'u-ns s'r. nuuesur, or:

EWICKENHAM, ENGLANF), ASSIGNOR TO THE ALUMINUM SOLDER- (70., 111.3% I'ZED, A COMPANY 03 GREAT BRITAIN. V

-MAE'UIEACTURING SOLTDEILJ Specification of Patented More, 1920 Letters Patent.

Serial No. 121;?311. Renewed November 11, 1918.

Serial No. 337,332.

To all whorl it may, concern:

lie it known. that l, lluormu E MIL lruium JEAN Puuorur iiiiviuiu' losses or Si: LAU- RENT, u subject of the King oi Belgium, and a resident of Twickenhzum-irr the county of illiddlesex, England, have invented new and useful Improvement in Manufacturing Solder, of which the following is u specifics tion. v

This invention relates to solder use for uniting metals snd alloys especially aluminium and its alloys, and hasi'or its object to provide an. improved solder sud u process for manufacturing same.

According to my invention the solder which consists of tih and zinc, is prepared in a s I the following munner:

The constituents, which hove very different, fusing points, are melted in. separate crucibles with the following; precautions. Each crucible employed should be a new one of plumbugo and should be used for no other purpose than the herein described process. Iii particular, no foreign metals or alloys should, under any circumstances, be melted in it.

Before using the crucible it should be wellauneuled as by inverting it over the top of a furnace.

The crucible should ufterwurd be lined with a paste consisting of iO parts of aluminium oxid,

20 parts of carbon, preferably charcoal.

'lS-hcse ingredients should be mixed with Water fro form with which the walls, and particularly the bottom of the crucible should be welllined. The lining should be rvell dried until the interior of the crucible becomes a. grayish White, The crucible-is lined in the mannerebovc described in order to prevent any chemical reaction. being brought about by the metals coming in contact with the wells of the crucible. To prevent oxidation the crucibles should be covered with lids While the melting process is going on; or the metal may be covered with a layer of carbon, preferably charcoal, with the same object. The ingredients used should bees pureas practicable, preferably of chemical purity.

The molten'metalsare poured togetherinto a fresh crucible with the precautions *ibove described. The mixture is then well;

stirred witheu iron rod covered with plumbago, and poured into chilled or other suitable molds, preferably o; plumbego laced with talc,

The proportions of the constituent metels which I have found useful. are as follows 1 Medic m. colder,

2 kilos tin.

5 kilos zinc.

it is udvisublc to prepare the solder in large quantities so as to minimize oxidation and the amount of dross in pouring.

The improved solder may be used iu thev customer manner in connection with a blow pipe, solr eriug iron or the like. No hm heed beused nor is any special lpreliminury preparation ueoess ry, Generally speaking the mostsatisfactory results are secured' then stirring the mixture in said third cru-' cible and then pouring the same into molds.

2. The method of making solder which consists in lining suitable crucibles with aluminum raid and carbon, in proportions of approximately parts of aluminum oxid and 20 parts of carbon, then meltiu separatelyin such lined crucibles zinc an tin in proportions of 2 kilos of tin end 5 kilos of zinc, then. pouring the molten zinc from one crucible and the molten tin from another crucible into 2|, third crucible treated as above set forth, t'h'en stirring the mixture in said third crucible and. then pouring the same into molds. i

3. The method of making solder which consists in lining suitable plumbago" crucibles with aluminum mild and carbon in'the form of charcoal, then melting separately in such lined crucibles zinc and tin, then pouring molten zinc from one crucible and molten tin from another crucible into a third crucible treated as above set forth in the proportions of lrilos of tin to 5 kilos of ing of approximately 70 parts;

mm from. one c-mcible and mo'itflm tin from :1 xmtfim crumble into a zhlrd. sruclble treated.

shave se; form 1n. the approxmmte proporfiimzs 0f 2 kilos 0f tin to 5 kilos of zinc,

than stirring the; molten, mixture in said film-d armrnbie and than 'p-mulng the same int) moms.

In testimony Whbl'QOf I have hereunto subscribed my nanmfiafis second day of Sep temhem 191$.

mm ma. sfivumi 31 .2321? m; ST. LAURENT. 

